PR11075: -W option to turn warnings into errors

* session.h
* NEWS: Discuss it.
* main.cxx: Parse it.
* session.h (num_errors): Provide it.
* semok/fortyeight.stp, semok/thirtyseven.stp: Test it.

2 files changed, 12 insertions, 0 deletions

diff --git a/testsuite/semko/fortyeight.stp b/testsuite/semko/fortyeight.stp
new file mode 100755
index 00000000..34bcad01
--- /dev/null
+++ b/testsuite/semko/fortyeight.stp
@@ -0,0 +1,6 @@
+#! stap -Wp2
+
+# PR 11075
+
+global foo  # evokes warning
+probe begin { exit() }
diff --git a/testsuite/semok/thirtyseven.stp b/testsuite/semok/thirtyseven.stp
new file mode 100755
index 00000000..fb378359
--- /dev/null
+++ b/testsuite/semok/thirtyseven.stp
@@ -0,0 +1,6 @@
+#! stap -wWp2
+
+# PR 11075
+
+global foo  # evokes warning
+probe begin { exit() }